MSS - Measurement unit

Static pressure measurement unit for circular ducts

Comprising measurement element and pressure transmitter with LCD display. The unit is designed to be used in combination with static pressure control damper HFS to maintain the desired constant duct pressure

The casing of the measurement unit shall be made of galvanized steel. The measurement unit shall have integral gaskets. The flow measurement probe pipes shall be made of aluminium. The unit shall have integrated pressure transmitter (0-10V signal) with display showing measured value.

Function

Halton MSS

Duct static pressure is accurately determined using multipoint averaging measurement. The duct static pressure is measured between the Halton MSS measurement tab and the reference space. The pressure of reference space represents the air pressure of the spaces in the ventilation system’s service area (see Installation section).

The Halton MSS unit includes static type pressure measurement sensor with a digital display of the actual pressure value. The measured value is transmitted using 0 to 10 volt signal.

Installation

Halton MSS

The static pressure measurement unit must be installed in a space where ambient temperature is between 0 and 45°C.

Ductwork installation, Safety distances

In order to ensure the accuracy of the duct static pressure, measurement the safety distances between the measurement unit and flow disturbances (e.g. bends, T-branches) must be respected. The necessary safety distances before and after different disturbances are presented in figures below.

90° elbow

Branch on supply duct

Branch on exhaust duct

Safety distance between MDC/HFS control damper and MSS, straight duct

Measurement tube connections

Connect the pressure measurement tube from the unit to the sensor, either to +/- taps, according to the exhaust/supply application. Supply connection is the default factory setting.

In typical installations the reference pressure inlet (+ for exhaust installation and - for supply installation) is left open at the ambient air. If necessary, the reference pressure can be connected to the reference pressure inlet by the contractor using Ø 6/4 mm measurement tubes.

Connection of measurement tube to the transmitter in supply and exhaust installations.

Halton is passionate about indoor environments. We offer business-enhancing products, systems, and services for comfortable, energy-efficient, and safe environments to customers who value people's wellbeing. Halton is involved from target-setting to facility use and focuses on creating positive indoor environment experiences for people.